In view of this is it not possible to use direct expansion equipment in a low level displacement application?
When using displacement ventilation it is necessary to design the system so that the during the cooling cycle the air temperature being supplied to the space is at a higher temperature than is used for mixed flow ventilation – this is because of comfort considerations. However, if it is accepted that the air temperature adjacent to low level outlets is uncomfortably low and the layout of the space can be made to accommodate this then it may be a cost effective solution – particularly for high spaces such as large studios where it is inevitable a vertical temperature gradient arises but is of little consequence how high the air temperature is above the occupied zone. This system breaks all the rules of accepted displacement design but may be an acceptable compromise.
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- In view of this is it not possible to use direct expansion equipment in a low level displacement application?
